Two glitches in ac4?

I am now into Sequence 4 and was playing around on Kingston chasing the shanties...but after I caught them, the icons dont disappear from the map, and I run back thinking I didnt get them, but they arent there...just the icons on the map and also a few times when I go to board a schooner that carries at least 3 items (a combination of wood, cloth, or rum, plus fire barrels), I will get an instant desynch...anyone else have these issues? Doesnt seem to do it on anything but the schooners I mentioned above.